| Mineral | Cowlesite |
|---|---|
| Formula | CaAl2Si3O10 ยท 6H2O |
| Crystal Form | Orthorhombic/Dipyramidal [2/m 2/m 2/m] |
| Cleavage | {010} Perfect |
| Color | Colourless, White, Bluish |
| Density | 2.1 g/cm3 |
| Diaphaneity | Transparent, Translucent |
| Hardness | 5.0 - 5.5 |
| Lustre | Vitreous, Greasy |
| Streak | White |
| Type Loc. | Neer Road Pit, Goble, Columbia Co., OR, USA |
| Dana 8 Class | 77.1.5.8 |
| Strunz Class | 8/J.24-10 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 468 |